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Automobile differential

A kind of technology of automobile differential and casing

Inactive Publication Date: 2018-04-20
NINGBO SHANGZHONGXIA AUTOMATIC TRANSMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing differentials have the following defects: In order to ensure high efficiency and good reliability of transmission, the planetary gear shaft must be required to ensure sufficient size, and this greatly limits the space for the planetary bevel gear in the differential housing, because the planetary The bevel gear is sleeved and fixed on the planetary gear shaft, that is to say, the size of the position of the bevel top of the planetary bevel gear is limited, so that in the limited space in the differential case, the tooth width of the planetary bevel gear is limited. As a result, the length of the meshing line between the planetary bevel gear and the side shaft gear is short, which easily leads to tooth surface ablation and tooth root fracture of the planetary bevel gear

Method used

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  • Automobile differential
  • Automobile differential
  • Automobile differential

Examples

Experimental program
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Embodiment 1

[0028] Such as Figure 1-4 As shown, the automobile differential includes a housing 1, a half-shaft bevel gear 3 and a planetary bevel gear 2 all arranged in the housing 1, the housing 1 is an integral structure, and the housing 1 is provided with a shaft hole 1c .

[0029] There are two half-shaft bevel gears 3, and the two half-shaft bevel gears 3 are arranged oppositely and are both rotatably connected in the housing 1. The contact surfaces between the two half-shaft bevel gears 3 and the housing 1 are all conical surfaces. A gasket 4 is also provided between the bevel gear and the housing 1 , and the shape of the gasket 4 is a conical shape matching the contact surface of the side shaft bevel gear 3 and the housing 1 . According to actual needs, the contact surface can be designed as a plane or a spherical surface.

[0030]The planetary bevel gear 2 comprises a wheel shaft portion 2b and a solid conical gear portion 2a, the wheel shaft portion 2b is connected to the larg...

Embodiment 2

[0033] This embodiment is basically the same as Embodiment 1, the difference is: as Figure 5 and 6 As shown, the housing 1 includes a front shell 1a and a rear shell 1b, the front shell 1a and the rear shell 1b are respectively provided with a half hole 1c1 and a half hole 2 1c2, the front shell 1a and the rear shell 1b are fixed by fasteners 5 and Half hole one 1c1 and half hole two 1c2 encircle to form shaft hole 1c. When installing, first place one of the side bevel gears 3 and the corresponding gasket 4 at the installation position corresponding to the rear shell 1b through loose fitting, then put the gasket 4 on the two planetary bevel gears 2, and place the wheel shaft part 2b In the half hole 1c2 of the rear shell 1b, the gear part 2a is kept in mesh with the side gear, and then the front shell 1a that has assembled another half shaft bevel gear 3 and the gasket 4 is covered, and the front shell 1a is fixed by the fastener 5. The shell 1a and the rear shell 1b are fi...

Embodiment 3

[0035] This embodiment is basically the same as Embodiment 1, the difference is that a bearing is fixed in the shaft hole 1c, and the axle part 2b passes through the inner ring of the bearing and is fixed with the inner ring of the bearing, which makes the installation more convenient and stable. better.

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PUM

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Abstract

The invention provides an automobile differential and belongs to the technical field of machines. The problem that tooth surface ablation and tooth roof fracture of bevel planet gears of existing automobile differentials are liable to occur is solved. The automobile differential comprises a shell, a semi-axle bevel gear and a bevel planet gear, wherein the semi-axle bevel gear and the bevel planetgear are arranged in the shell; a shaft hole is formed in the shell; the bevel planet gear comprises a wheel axle part and a solid conical gear part; the gear part is engaged with the semi-axle bevelgear; the wheel axle part is connected to the end with the larger inner diameter of the gear part, and the wheel axle part and the end of the gear part are integrally formed; and the wheel axle partis rotationally connected in the shaft hole. According to the automobile differential, the structure of a planet gear shaft is omitted, thus, the space for mounting the planet gear shaft originally inthe shell can be fully used, the size of a cone vertex of the gear part can be reduced, the tooth width of the gear part and the length of the line of contact of the semi-axle bevel gear are increased, the possibility of tooth surface ablation and tooth roof fracture of the bevel planet gear is lowered, and the high transmission efficiency and reliability can be ensured.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to an automobile differential gear. Background technique [0002] The power of the automobile engine is finally transmitted to the drive axle through the transmission shaft, and distributed to the left and right axle shafts in the drive axle to drive the wheels, and the main components of the drive axle include the differential. A vehicle differential is a mechanism that enables the left and right (or front and rear) drive wheels to rotate at different speeds. It is mainly composed of left and right side shaft gears, planetary gears and gear racks. The function is to make the left and right wheels roll at different speeds when the car is turning or driving on an uneven road, that is, to ensure the pure rolling motion of the driving wheels on both sides. [0003] As a structure with high transmission efficiency and good reliability, the differential planetary gear shaft is widely us...

Claims

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Application Information

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IPC IPC(8): F16H48/08F16H48/40F16H48/38F16H57/04
Inventor 顾宗浩孙峰罗大国林霄喆
Owner NINGBO SHANGZHONGXIA AUTOMATIC TRANSMISSION
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